Which of the following is a flightless bird?
_______ is the largest flightless bird.
Flightless bird is:
Which among the following is NOT a flightless bird?
Solve the following crossword puzzle:
1. Winter sleep of animals
2. An average weather pattern over a long period of time
3. Water vapour content in atmosphere
4. A flightless bird of polar region
2. A very good example of camouflage
6. Height of a place above sea level
Which of the following characteristics feature is found in all birds including flightless birds?